Fall 2010: Left the team following the fall quarter ... At that time, ranked second on NU's top times list for the year in the 100 breast and third in the 200 breast while swimming with the Wildcats' top 200 medley relay of the fall ... Was third in the 100 breast, fourth in the 50 breast and 200 breast and 12th in the 50 fly at NU's own five-team TYR Invitational (11/19-11/21) ... Finished in the top-3 all four times he swam the 100 breast in the fall, including a pair of season-best second-place efforts against Purdue (11/5) and Wisconsin (11/11).

2009-10: Northwestern's top swimmer on the year in the 100 breast while ranking second in the 200 breast ... Swam the breast leg on both of NU's top medley relays, earning NCAA 'B' provisional qualifying times with both at the Big Ten Championships ... Academic All-Big Ten ... Qualified for the consolation final in the 100 breast at the Big Ten meet, swimming a career-best and 'B' cut of 55.20 in the heat to take 13th ... Won the bonus final of the 200 breast at the conference meet with a career-best 2:00.16 ... Made the championship final in all three breast events at the six-team TYR Invitational, taking eighth in the 100 and 200 while finishing second in the 50 ... Finished in the top three in every 100 breastdual meet race on the year ... Won the 100 breast against Notre Dame (1/9) and Iowa (1/23) ... Captured the 50 breast versus UIC (11/14) and the 200 breast against Carthage and Lewis (1/16) ... Recorded 14 top-three dual meet finishes on the year.

2008-09: Member of NU's breaststroke squad ... Earned the team's second-best time of the season in the 100 breast and third-best in the 200 breast ... Competed in the 100 breast, 200 breast and 50 free at the Big Ten Championships, turning in season-best times in each event ... Swam a 56.03 in the 100 breast at the conference meet ... Cut nearly seven seconds off his previous best-time in the 200 breast at Big Ten Championships with a 2:02.93 ... Advanced to the final heat in both the 100 and 200 breast at the TYR Invitational (11/21) ... Nabbed the top spot in the 100 breast against Iowa (1/24) ... Secured two second-place finishes in the same event, against Wisconsin (11/13) and Notre Dame (1/16) ... Swam to 12 top-five finishes on the year.

High School: Won the 2007 Ohio state title in the 100 breaststroke ... Earned an Olympic Trial cut in the 100 breaststroke ... 10-time All-American ... Three-time Scholastic All-American ... Named Fort Ancient Valley Conference (FAVC) Swimmer of the Year ... Two-time Cincinnati Enquirer All-City selection ... Won All-FAVC honors all four years of high school ... Owned 10 team and pool records ... Swam one year of club with the Anderson Barracudas ... Set team records in both breaststroke distances ... Named to the 4.0 and Above Honor Roll ... Magna Cum Laude in Latin ... Earned the Spartan Academic Gold Medal Award.

Personal: Born Nathan Michael Butler ... Son of Mike and Karla Butler ... Chose Northwestern over Notre Dame, Purdue, Virginia, Penn State and Clemson ... Double major in economics and classics with a concentration in Latin.